Geumjeongsanseong
Largest mountain fortress in South Korea. Fortress was built in 1703 and its walls were some 17 km long, 1.5 – 3 m tall.
Long Wall of Quảng Ngãi
127.4 km long rampart, most likely built in the early 16th century and reinforced in 1819 as ordered by Nguyễn emperors. Wall is up to 4 m high and 2.5 m wide, mostly built from rocks. Wall is parallel to an ancient trade route.
Sungbo’s Eredo
160 km long ring-wall enclosing ancient land of Sungbo. Built sometimes around 1000 AD by local culture.